Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2807ec133fb6414…

MALICIOUS

PDF

72.7 KB Created: 2020-12-24 19:29:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 787148f55de0a0ce1182988e70cad7c8 SHA-1: ba69231997301ab544f20f363598f3918a949195 SHA-256: d2807ec133fb6414a112a0d46d5fcefd73d6d2c45323bb114e74582bf7969b84
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, alongside a critical finding of a PDF link farm. The embedded URLs, such as 'https://gettraff.ru/strik?utm_term=trickshot+deathrun+code+old+wiking', are indicative of a phishing or malware distribution attempt. The ML classifier and ClamAV detection further support the malicious nature of this file, suggesting it's part of a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://gettraff.ru/strik?utm_term=trickshot+deathrun+code+old+wiking In PDF document text
    • https://mosozedap.weebly.com/uploads/1/3/1/8/131856454/41e4b8c8c9.pdfIn PDF document text
    • https://cdn.sqhk.co/jasorevujoxu/DjbCzgc/32299861524.pdfIn PDF document text
    • https://cdn.sqhk.co/zifakepavax/hjNyyih/canon_ir_2202_error_e000-_000.pdfIn PDF document text
    • https://cdn.sqhk.co/gibuzini/PhgayYW/ashampoo_droid_optimizer_review.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/a6911391-f41b-4659-9b14-90aaa4923a1b/32433768819.pdfIn PDF document text
    • https://s3.amazonaws.com/nitajosasa/51083209755.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/29ddbae3-be43-48e5-b8e5-e5230b45e680/.pdfIn PDF document text
    • https://s3.amazonaws.com/daniwodug/81116500482.pdfIn PDF document text
    • https://s3.amazonaws.com/gezetega/flexner_report_1910_summary.pdfIn PDF document text
    • https://s3.amazonaws.com/vaxebisapesi/thomas_calculus_2_12th_edition_trke.pdfIn PDF document text
    • https://s3.amazonaws.com/vibove/simple_harmonic_motion_pendulum_lab_report_discussion.pdfIn PDF document text
    • https://s3.amazonaws.com/pewibim/25457334419.pdfIn PDF document text
    • https://s3.amazonaws.com/vavabi/cs_go_apk_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/38ae9d3f-3608-4616-8b2a-7ae1151a640c/atomic_command_fallout_76.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c479.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC479 5308 bytes
SHA-256: 2c37fbe9f05209da342785f9000884a5f03c7312482e77a6e503008b051a0ed6
font_01_sfnt_off0000d694.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD694 10996 bytes
SHA-256: d06f798dbd2cdef6cd18e14f9f275d83cf0cef779f5fae3af95716df058852a3
font_02_sfnt_off0000fc3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC3E 17340 bytes
SHA-256: d3d0098c20efc91c4776fc47b9bfa8088e88dae4e456ffd3b81695810518f80d

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